The Official ASE Study GuideASE AutomobileTestsIncludes Light Vehicle/CNG, Exhaust Systems, Auto Service Consultant Tests!

ASE Automobile TestsTable of ContentsOverview . 3–8Automobile Tests. 9–63 Engine Repair (Test A1).9 Automatic Transmission/Transaxle (Test A2).15 Manual Drive Train and Axles (Test A3).20 Suspension and Steering (Test A4).26 Brakes (Test A5).33 Electrical/Electronic Systems (Test A6).40 Heating and Air Conditioning (Test A7).46 Engine Performance (Test A8).51 Light Vehicle Diesel Engines (Test A9).58Service Consultant Test. 64–68 Automobile Service Consultant (Test C1).64Alternate Fuels Test. 69–73 Compressed Natural Gas Vehicle (Test F1).69Specialty Tests. 74–78 Exhaust Systems (Test X1).74Test Prep & Training. 79

OverviewIntroductionThe Official ASE Study Guide of Automobile Tests is intended to help techniciansstudy for the ASE certification tests. The information in this booklet covers thetechnology found in most all of today’s automobiles, sport utility vehicles, andlight trucks. The specific information about each test, found in the followingpages, should prove to be a useful tool for reviewing the technical knowledge thatis covered in the Automobile tests. After performing a thorough review, it shouldbe easier to select additional reference material that will assist you with your testpreparation needs.ASE voluntary certification is a means through which technicians can provetheir abilities to themselves, to their employers, and to their customers. By passing ASE tests you will earn the most valuable credential available to automotivetechnicians. Because the tests are tough, you’ll have the satisfaction of provingto yourself that you are among the elite in your profession. What’s more, thesecredentials are recognized throughout the nation.Certified technicians promote customer trust and improve the image of theindustry. And trust and professionalism are the first steps to a better, more prosperous business.ASE encourages you to take the tests and to join the proven pros who wearthe ASE Blue Seal of Excellence .How Do I Become Certified?There are nine tests in the Automobile Technician certification series. If youpass one or more tests, and have at least two years of hands-on working experience in automotive repair, you will become certified as an ASE AutomobileTechnician.If you pass tests A1 through A8 and meet the experience requirement, youwill earn the certificate of Master Automobile Technician. Note: Test A9 isnot required for Master Automobile Technician status. (Appropriate vocationaltraining may be substituted for up to one year of work experience.)If you are currently certified in Diesel Engines (A9, H2, S2, or T2)and Electrical/Electronic Systems (A6, H6, S6, or T6), you are eligible to take theL2 Electronic Diesel Engine Diagnosis Specialist test.If you fail a test, you may take it again during any subsequent test windowin which it is offered. And remember, you are the only one who will receive yourASE Automobile Study GuidePage 3

Overview (continued)tests scores; results will not be given over the phone nor will they be releasedto anyone without your written permission.This Study Guide contains Test Specifications, task lists, and samplequestions for the following ASE tests: Automobile Tests: Engine Repair (Test A1); Automatic Transmission/Transaxle (Test A2); Manual Drive Train and Axles (Test A3); Suspensionand Steering (Test A4); Brakes (Test A5); Electrical/Electronic Systems(Test A6); Heating and Air Conditioning (Test A7); Engine Performance(Test A8); and Light Vehicle Diesel Engines (Test A9) Service Consultant Test: Automobile Service Consultant (Test C1) Alternate Fuels: Compressed Natural Gas Vehicle (Test F1) Specialty Tests: Exhaust Systems (Test X1)You will become an Undercar Specialist when you pass the XI test andmeet the following requirements. You must be currently certified (including thetwo-year experience requirement) in the ASE Suspension and Steering (A4) andBrakes (A5) areas BEFORE you will be permitted to register and take the X1test. If your A4 and/or A5 certification has expired, you may NOT register for theX1 test until after you have renewed your A4 and A5 certification.ASE also offers certification in Medium/Heavy Truck, Truck Equipment,School Bus, Transit Bus, Collision Repair/Refinish, Parts Specialist, andAdvanced Level specialties. Separate Study Guides are available.For full information on ASE testing as well as downloadable Study Guides,other test preparation resources, and more, visit Writes the Questions?The questions, written by service industry experts familiar with all aspects ofautomobile repair, are entirely job-related. They are designed to test the skills thatyou need to know in servicing automobiles; theoretical knowledge is not covered.Each question has its roots in an ASE “item-writing” workshop whereservice representatives from automobile manufacturers (domestic and import),aftermarket parts and equipment manufacturers, working technicians and vocational educators meet in a workshop setting to share ideas and translate them intotest questions. Each test question written by these experts must survive review byall members of the group. The questions are written to deal with practical problems of diagnosis and repair experienced by technicians in their day-to-day work.From there, all questions are pre-tested and quality-checked on a nationalsample of technicians. Those questions that meet ASE standards of quality andaccuracy are included in the scored sections of the tests; the “rejects” are sentback to the drawing board or discarded altogether.Page 4ASE Automobile Study Guide

Overview (continued)How Long are the Tests?Certification RecertificationTests TestsASE Tests 2012Number ofTestName questions*Testing Number oftime questionsTestingtimeAutomobile/Light Truck TestsA1Engine Repair601¼ hrs.2530 min.A2Automatic Transmission / Transaxle601¼ hrs.2530 min.A3Manual Drive Train and Axles501 hr.2030 min.A4Suspension and Steering501 hr.2030 min.A5Brakes551¼ hrs.2330 min.A6Electrical / Electronic Systems601½ hrs.2545 min.A7Heating and Air Conditioning601¼ hrs.2530 min.A8Engine Performance601¼ hrs.2530 min.A9Light Vehicle Diesel Engines601¼ hrs.n/an/a601¼ hrs.2530 min.651½ hrs.2845 min.501 hr.2030 min.Service Consultant TestC1Automobile Service ConsultantAlternate Fuels TestF1Compressed Natural Gas VehiclesSpecialty TestsX1Exhaust Systems* ASE certification tests usually include ten additional research questions that are not countedfor score. You will not be told which questions these are, so you should answer every question.No research questions are added to Recertification Tests. You are only eligible to take theRecertification Test when you have previously passed the corresponding initial certification Test.How Do I Prepare for the ASE Tests?Become familiar with test content and question format: The Test Specificationsin this booklet contain a summary description of the content covered by eachtest. The Task Lists describe the actual work performed by technicians in eachspecialty area. Together, these form a “blueprint” for writing and assemblingthe ASE tests.ASE Automobile Study GuidePage 5

Overview (continued)Please note that each question on the test is keyed, or linked, to a particulartask or set of tasks in the task list. Therefore, a review of the task lists, with aneye to judging whether you know how to perform each task listed, will provideyou valuable information as you prepare for the tests.There are five types of multiple-choice questions on the tests, each of whichis included in the sample questions in this booklet. Note the different instructionsfor each question type.Be sure to read each question carefully, (twice, if necessary) so that youunderstand exactly what is being asked. Each question tests a specific diagnosticor repair problem and has only one correct answer.To summarize, we suggest the following steps be taken:Step 1. Study the content list for each test you will attempt.Step 2. Carefully read the task list for each area.Step 3. Go over the sample questions to become familiar with each questiontype. This is very important.Step 4. Review steps 1 through 3 and identify the skill area(s) where you needadditional study.Types of Knowledge Measured By the TestsThe types of knowledge and skills you will need to know to pass the tests are asfollows: Basic technical knowledge: Tests your knowledge of what is in a system andhow the system works, and what are the proper procedures and precautions tobe followed in making repairs and adjustments. Service or repair knowledge and skill: Tests your understanding and abilityto apply generally accepted repair procedures and precautions in assembly,disassembly, and reconditioning operations; and in making inspections andadjustments. Also tests your ability to use shop manuals and precision toolsof the trade. Testing and diagnostic knowledge and skill: Tests your ability to recognizeproblems and to use generally available measurement and testing equipmentto make a diagnosis. Also tests your ability to trace the effects of a particularcondition and find the cause of a particular set of symptoms.If you are an experienced and knowledgeable technician, a careful review ofthis booklet, and additional brush-up on those areas in which you are weakest, isall you should need to pass the ASE tests.Page 6ASE Automobile Study Guide

Overview (continued)Before The TestsTry to be well-rested for the test so you will be alert and efficient. Be sure tobring along your test center admission ticket and a current photo I.D. Lockerswill be provided for personal items, including cell phones.At the Test Center—Some TipsArrive early enough to park and find the Test Center office. Late arrivals may beturned away by the Test Center staff. If you cannot take a test because you arelate, you will forfeit your test fees.Bring your Admission Ticket and photo ID with you. Books, calculators,and other reference material will not be permitted in the test room. You will beassigned a locker to store all your personal items (cell phone, coat, hat, etc.)No electronic devices are allowed in the test room.You will receive scratch paper and pencils, and if you are taking anAdvanced Level test, a Composite Vehicle booklet. Once you are seated,the supervisor will explain how to use the computer and mouse. Each testappointment begins with a short tutorial that will help you become familiarwith the operation of the computer-based test. You can also preview the systemonline at before you go to take your test.Each test has a specific time limit, as listed earlier. As you take each test,the computer screen will continuously display the amount of time left. You cantake a break if necessary, but the clock will continue to run. If you finish early,you may review your answers or continue to the next test, if your appointmentincludes multiple tests. Once you submit a test for scoring, you cannot go backand review it.If a question is difficult, mark the answer that you think is correct andflag the question using the on-screen button. Then go on to the next question.When you have finished the test, you may have time to go back to those questionsyou have flagged. Your score is based on the number of correct answers that yougive, so it is to your advantage to answer every question.When you finish your last test, you will be given a short customer satisfaction survey. When you complete it, you can report to the staff and receive yourscore reports.ASE Automobile Study GuidePage 7

Overview (continued)Test Content and Sample QuestionsThe following material is designed to help technicians prepare for the ASEcertification tests.Each section begins with the Test Specifications, which will list the maincategories covered on that particular test and the number of test questions andpercentage of the test devoted to each topic.The Task List describes the work activities a technician should be able toperform in each technical area covered on that test. This list was developed byworking technicians and technical experts from across the country and willprovide a valuable check list of what to study for the test.These task descriptions offer detailed information to technicians preparingfor the test and to persons who may be instructing technicians. The task lists mayalso serve as guidelines for question writers, reviewers, and test assemblers.It should also be noted that the number of questions in each content area maynot equal the number of tasks listed. Some of the tasks are complex and broadin scope and may be covered by several questions. Other tasks are simple andnarrow in scope and one question may cover several tasks. The main objectivein listing the tasks is to describe accurately what is done on the job, not to makeeach task correspond to a particular test question.Sample questions follow. Although these same questions will not appear onactual tests, they are in the same format as actual test questions. All five types ofmultiple-choice questions used on the ASE tests are represented here. Note thedifferent instructions for some questions. Page 8ASE Automobile Study Guide

Test Specifications and Task ListEngine Repair (Test A1)ContentAreaA. General Engine DiagnosisB. Cylinder Head and Valve TrainDiagnosis and RepairC. Engine Block Diagnosis and RepairD. Lubrication and Cooling SystemsDiagnosis and RepairE. Fuel, Electrical, Ignition, and ExhaustSystems Inspection and ServiceTotalQuestionsin TestPercentageof Test1530%101020%20%816%714%50100%A. General Engine Diagnosis (15 questions)1. Verify driver’s complaint and/or road test vehicle; determine necessary action.2. Determine if no-crank, cranks but will not start, or hard starting condition is anengine mechanical problem, or is caused by another vehicle subsystem.3. Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessaryaction.4. Isolate engine noises and vibrations; determine necessary action.5. Diagnose the cause of excessive oil consumption, coolant consumption, unusualengine exhaust color, and odor; determine necessary action.6. Perform engine vacuum tests; determine necessary action.7. Perform cylinder power balance tests; determine necessary action.8. Perform cylinder cranking compression tests; determine necessary action.9. Perform cylinder leakage tests; determine necessary action.B. Cylinder Head and Valve Train Diagnosis and Repair (10 questions)1. Remove cylinder heads, disassemble, clean, and prepare for inspection.2. Visually inspect cylinder heads for cracks, warpage, corrosion, leakage, and thecondition of passages; determine needed repairs.3. Inspect and repair damaged threads where allowed; install core and gallery plugs.4. Inspect, test, and verify valve springs for squareness, pressure, and free heightcomparison; replace as necessary.5. Inspect valve spring retainers, rotators, locks/keepers, and lock grooves.6. Replace valve stem seals.7. Inspect valve guides for wear; check valve stem-to-guide clearance; determineneeded repairs.ASE Automobile Study GuidePage 9

A1 Task List (continued)8. Inspect valves and valve seats; determine needed repairs.9. Check valve spring installed (assembled) height and valve stem height; determinedneeded repairs.10. Inspect pushrods, rocker arms, rocker arm pivots, and shafts for wear, bending,cracks, looseness, and blocked oil passages; repair or replace as required.11. Inspect and replace hydraulic or mechanical lifters/lash adjusters.12. Adjust valves on engines with mechanical or hydraulic lifters.13. Inspect and replace camshaft(s) (includes checking drive gear wear and backlash,end play, sprocket and chain wear, overhead cam drive sprocket(s), drive belt(s),belt tension, tensioners, camshaft reluctor ring/tone-wheel, and variable valve timingcomponents).14. Inspect and measure camshaft journals and lobes; measure camshaft lift.15. Inspect and measure camshaft bore for wear, damage, out-of-round, and alignment;determine needed repairs.16. Inspect valve timing; time camshaft(s) to crankshaft.17. Inspect cylinder head mating surface condition and finish, reassemble and installgasket(s) and cylinder head(s); replace/torque bolts according to manufacturers’procedures.C. Engine Block Diagnosis and Repair (10 questions)1. Remove and disassemble engine block; clean and prepare components for inspectionand reassembly.2. Visually inspect engine block for cracks, corrosion, the condition of passages, coreand gallery plug hole condition, surface warpage, and surface finish and condition;determine necessary action.3. Inspect and repair damaged threads where allowed; install core and gallery plugs.4. Inspect and measure cylinder walls; hone and clean cylinder walls; determine needfor further action.5. Inspect crankshaft for end play, journal damage, keyway damage, thrust flange andsealing surface condition, and visual surface cracks; check oil passage condition;measure journal wear; check crankshaft reluctor ring/tone wheel (where applicable);determine necessary action.6. Inspect and measure main bearing bores and cap alignment; mark caps for locationand direction.7. Install main bearings and crankshaft; check bearing clearances and end play;replace/torque bolts according to manufacturers’ procedures.8. Inspect camshaft bearings for excessive wear and alignment; replace bearings ifnecessary; install camshaft, timing chain and gears; check end play.9. Inspect auxiliary (balance, intermediate, idler, counterbalance, or silencer) shaft(s),drive(s)/gear(s), and support bearings for damage and wear; time balance shaft tocrankshaft; determine necessary action.10. Inspect, measure, service, or replace pistons and piston/wrist pins; identify pistonand bearing wear patterns caused by connecting rod alignment problems; determinenecessary action.11. Inspect connecting rods for damage, bore condition, and pin fit; determine necessaryaction.Page 10ASE Automobile Study Guide

A1 Task List (continued)12. Inspect, measure, and install or replace piston rings; assemble piston and connectingrod; install piston/rod assembly; check bearing clearance and sideplay; installconnecting rod bearings; replace/torque fasteners according to manufacturers’procedures.13. Inspect, reinstall, or replace crankshaft vibration damper (harmonic balancer).14. Inspect crankshaft flange and flywheel mating surfaces; inspect and replacecrankshaft pilot bearing/bushing (if applicable); inspect flywheel/flexplate forcracks and wear (includes flywheel ring gear); measure flywheel runout; determinenecessary action.15. Inspect and replace pans and covers.16. Assemble the engine using gaskets, seals, and formed-in-place (tube-applied) sealants, thread sealers, according to manufacturers’ specifications; reinstall engine.D. Lubrication and Cooling Systems Diagnosis and Repair (8 questions)1. Diagnose engine lubrication system problems; perform oil pressure tests; determinenecessary action.2. Disassemble and inspect oil pump (includes gears, rotors, housing, and pick-upassembly); measure oil pump clearance; inspect pressure relief devices and pumpdrive; determine necessary action.3. Inspect, test, and replace internal and external engine oil coolers.4. Fill crankcase with oil and install engine oil filter.5. Perform cooling system pressure tests; perform coolant dye test; determine necessaryaction.6. Inspect and test radiator, heater core, pressure cap, and coolant recovery system;replace as required.7. Inspect, replace, and adjust drive belt(s), tensioner(s), and pulleys.8. Inspect and replace engine cooling system and heater system hoses, pipes and fittings.9. Inspect, test, and replace thermostat, coolant by-pass, and thermostat housing.10. Inspect and test coolant; drain, flush, and refill cooling system with recommendedcoolant; bleed air as required.11. Inspect and replace water pump.12. Inspect and test fan (both electrical and mechanical), fan clutch, fan shroud, air dams,and cooling fan electrical circuits; repair or replace as required.13. Verify proper operation of engine related warning indicators.E. Fuel, Electrical, Ignition, and Exhaust Systems Inspection and Service(7 questions)1. Inspect, clean or replace fuel injection system components, intake manifold, andgaskets.2. Inspect, service or replace air filters, filter housings, and intake ductwork.3. Inspect turbocharger/supercharger; determine necessary action.4. Test engine cranking system; determine needed repairs.5. Inspect and replace crankcase ventilation system components.6. Inspect and install ignition system components; adjust timing.7. Inspect and diagnose exhaust system; determine needed repairs. ASE Automobile Study GuidePage 11

Sample QuestionsEngine Repair (Test A1)Questions:1.Technician A says that part X shownis used to rotate the valve spring.Technician B says that part X shownabove is used to correct installed springheight.Who is right?(A) A only* (B) B only(C) Both A and B(D) Neither A nor B2.A compression test shows that one cylinder is too low. A leakage test on thatcylinder shows that there is too much leakage. During the test, air could beheard coming from the tail pipe. Which of these could be the cause?(A) Broken piston rings(B) A bad head gasket(C) A bad exhaust gasket* (D) An exhaust valve not seating3.Technician A says that main bearing oil clearance can be checked withplastigage.Technician B says that main bearing oil clearance can be checked witha feeler gauge.Who is right?* (A) A only(C) Both A and B(B) B only(D) Neither A nor B4.An engine is using too much oil.Technician A says that worn valve guides could be the cause.Technician B says that tapered cylinder walls could be the cause.Who is right?(A) A only* (C) Both A and B(B) B only(D) Neither A nor BPage 12ASE Automobile Study Guide

A1 Sample Questions (continued)5.A compression test has been made on an in-line 4-cylinder engine. Cylinders 2and 3 have readings of 10 psi. Cylinder 1 has a reading of 140 psi and cylinder4 has a reading of 145 psi.Technician A says that these readings could be caused by a blown head gasket.Technician B says that these readings could be caused by wrong valve timing.Who is right?* (A) A onlyWW(B) B only(C) Both A and B(D) Neither A nor BXXYYZZ6.To determine piston-to-cylinder wall clearance, the diameter of the pistonshown above should be measured at:(A) W.(B) X.* (C) Y.(D) Z.7.Which of these would most likely cause a fuel-injected engine to have lowfuel pressure?* (A) A clogged fuel filter(B) A clogged fuel injector(C) A restricted fuel return line(D) A stuck-closed fuel pressure regulatorASE Automobile Study GuidePage 13

A1 Sample Questions (continued)8.Technician A says that the setup shown above can be used to checkcylinder taper.Technician B says that the setup can be used to check cylinder out-of-round.Who is right?(A) A only* (C) Both A and B(B) B only(D) Neither A nor B9.The pressure and volume tests on a mechanical fuel pump are both belowspecs.Technician A says that an air leak in the fuel line between the tank andpump could be the cause.Technician B says that a plugged fuel tank pick up filter could be the cause.Who is right?(A) A only* (C) Both A and B(B) B only(D) Neither A nor BQuestion 10 is not like the ones above.It has the word LEAST. For this question, look for the choice that wouldLEAST LIKELY cause the described situation. Read the entire question carefully before choosing your answer.10. The LEAST likely cause of a bent push rod is:(A) excessive engine rpm.(B) a sticking valve.* (C) excessive valve guide clearance.(D) a worn rocker arm stud.Page 14ASE Automobile Study Guide

Test Specifications and Task ListAutomatic Transmission/Transaxle (Test A2)ContentAreaQuestionsin TestPercentageof TestA. General Transmission/Transaxle Diagnosis 2550%1. Mechanical/Hydraulic Systems (11)2. Electronic Systems (14)B. In-Vehicle Transmission/TransaxleMaintenance and Repair1224%C. Off-Vehicle Transmission/Transaxle Repair 1326%1. Removal and Installation (4)2. Disassembly and Assembly (5)3. Friction and Reaction Units (4)Total50100%A. General Transmission/Transaxle Diagnosis (25 questions)1. Mechanical/Hydraulic Systems (11 questions)1. Road test the vehicle to verify mechanical/hydraulic system problems based ondriver’s concern; determine necessary action.2. Diagnose noise, vibration, harshness, and shift quality problems; determine necessaryaction.3. Diagnose fluid loss, type, level, and condition problems; determine necessary action.4. Perform pressure tests; determine necessary action.5. Perform stall tests; determine necessary action.6. Perform torque converter clutch (lock-up converter) mechanical/hydraulic systemtests; determine necessary action.2. Electronic Systems (14 questions)1. Road test the vehicle to verify electronic system problems based on driver’s concern;determine necessary action.2. Perform pressure tests on transmissions equipped with electronic pressure control;determine necessary action.3. Perform torque converter clutch (lock up converter) electronic system tests;determine necessary action.ASE Automobile Study GuidePage 15

A2 Task List (continued)4. Diagnose electronic transmission control systems using appropriate test equipment,service information, technical service bulletins, and schematics; diagnose shorts,grounds, opens, and resistance problems in electrical/electronic circuits; determinenecessary action.5. Verify proper operation of charging system; check battery, connections, andpower/ground circuits.6. Differentiate between engine performance, or other vehicle systems, andtransmission/transaxle related problems; determine necessary action.7. Diagnose shift quality concerns resulting from problems in the electronic transmission control system; determine necessary action.B. In-Vehicle Transmission/Transaxle Maintenance and Repair (12 questions)1. Inspect, adjust, and replace manual valve shift linkage, transmission rangesensor/switch, and park/neutral position switch (inhibitor/neutral safety switch).2. Inspect, adjust, and replace cables or linkages for the throttle valve (TV) andaccelerator pedal.3. Inspect and replace external seals and gaskets.4. Inspect and replace driveshaft yoke, drive axle joints, and bushings, and seals.5. Check condition and operation of engine cooling system; inspect transmission cooler,lines and fittings.6. Inspect valve body mating surfaces, bores, valves, springs, sleeves, retainers,brackets, check balls, screens, spacer plates, and gaskets; replace as necessary.7. Torque valve body fasteners to specification.8. Inspect accumulator and servo bores, pistons, seals, pins/pin bores, springs, andretainers; repair or replace as necessary.9. Inspect, test, adjust, repair, or replace electrical/electronic components and circuitsincluding control modules, solenoids, sensors, relays, terminals, connectors, switches,and harnesses.10. Inspect, replace, and/or align power train mounts.11. Replace fluid and filter(s); verify proper fluid level and type (for transmissions with,or without, a dipstick).C. Off-Vehicle Transmission/Transaxle Repair (13 questions)1. Removal and Installation (4 questions)1. Remove and install transmission/transaxle; inspect engine core plugs, rear crankshaftseal, transmission dowel pins, dowel pin holes, and mating surfaces.2. Inspect converter flex (drive) plate, converter attaching bolts, converter pilot,crankshaft pilot bore, converter pump drive surfaces.3. Install torque converter and establish correct converter-to-pump engagement; inspectconverter free movement for pilot engagement during transmission installation.4. Inspect, test, flush or replace transmission fluid cooler.5. Inspect brackets, wiring harnesses, fuel lines, heat shields, inspection covers, andrelated components for proper routing and installation.6. Perform module coding and/or programming (including adaptive learning reset);road test to confirm proper operation.Page 16ASE Automobile Study Guide

A2 Task List (continued)2. Disassembly and Assembly (5 questions)1. Disassemble, clean, and inspect transmission case, sub-assemblies, mating surfaces,and thread condition.2. Inspect and measure fluid pump components; replace as necessary.3. Check bearing preload; determine needed service.4. Check end play; inspect, measure, and replace thrust washers and bearings as needed.5. Inspect shafts; replace as necessary.6. Inspect fluid delivery circuit, including seal rings, ring grooves, sealing surface areas,feed pipes, orifices, and encapsulated check valves (balls).7. Inspect bushings; replace as necessary.8. Inspect and measure components of the planetary gear assembly; replace asnecessary.9. Inspect case bores, passages, bushings, vents, mating surfaces, and dowel pins;repair or replace as necessary.10. Inspect valve body mating surfaces, bores, valve

ASE Au t o m o b i l E St u d y Gu i d E PA G E 3 ov E rvi E w Introduction The Official ASE Study Guide of Automobile Tests is intended to help technicians study for the ASE certification tests.The information in this booklet covers the technology found in most all of today